Belt for paper-finishing machines



Sept. 6,1927. ,173

- F. c. LADD ET AL BELT FOR PAPER FINISHING MACHINES Original Filed Avril 914 INVENTOR mflEY Patente'dSept. 6,1927. I v if a uni-Ts;- was TNT Fri-cs. I

FRANK c. LADD, or patron, Ann :snnnrzmna. NEAL, or srarnsrrn zn, Assaonosntrrs-essrsn eesro iSTEIEING ooiaralvr, or BosroN, MAssA- cnusar'rs, a-oonroan'rron or raasseenussrrs.

B L non,iae rnn-rrnrsrrrns MACHINES.

() ifligin al application filed'h'pril 2Q, 1914-, Serial 1 \T0. 833,270. Divide d and this application filed .April 17, i i 1520. Serial No. 374,531. I

The, present invention relates to improvecation above referred to. The invention intents; infabric for use in paper iinwhich this application is designed to cover "ishing machines, wherein paper-is given a relates to the construction of these belts. 5 'linenor other finish-bybe'in'g subjectedto It can readily be seenthat, under the,

5 pressure b t fab i fa heavy pressure exerted between the pressure It h for its object'the provision of an rolls. every blemish or irregularityin the,

endlessbelt which will present asmooth and belts will be faithfully reproduced in the unblemished surface to the paper, so, that surface ofthe paper. This will bet-he more 50" no marks orinjuries will befreceived by the serious as, owinmto the belts being endless, paper during the pressing action. i the same imperiection will be reproduced Thi li ti i -divi j nof an ap-- over and over again on the web of paper plica ion filed by us April 20, 1914;,Serial which is l g' f i I 7 No, 833,270, pursuant to which Patent No. Qne form of irregularity or blemish that 651 1,352,611 'was' granted S pt b 14, 1920,v is independent of the perfection of the ma for paper finishing machine, to which referterial of which the belt is made'is the joint ence is made for acomplete' description of where the two ends of the strip material are the machinein which our improved belt is joined to make an endless belt. It may, of designed for use. I

' As is stated in that application, inthe in endless form and havingnojoints, but, .preparation of high gradefinishedpaper,iit in any event, this would require special ma is customary to use a plater, comprising a chinery and would be very expensive. Our pair of rolls together with means for forcinvention is directed specifically to the procourse, be possible to construct a belt woven 70?" ing them together with great pressure and vision of a joint which will present nosimultaneously rotating them. In this problemishes or'irregularities at this point of cess the paper is dealt with only in sheets, the belt and whichwill not mar nor injure which are built up with. certain sheets of the paper when it comes in contact thereothenmaterialinto what is termed a book, with. which is then run between the rolls of the In order to give a clear view of the use 8e piater. The booltc'omprises a sheet of thin for which this belt is intended, the machine so metal, suclras zinc, then a sheet of linen, in which it is used will be briefly described.

then metal, then linen, paper, linen, and Reference will now be made to the accommetal, and, so forth. The book so made up panying drawings, in which. i is usually passed a number-of timesback Fig. 1' is a vertical longitudinal section of 8 wards and forwards between the rolls. In a paper finishing machine inwhich a belt this operation, the pattern of the linen is madeaccording to our invention is designed transferred to the paper, and, in consequence for use; of the slip which inevitably occurs between Fig. 2 is a fragmentary longitudinal seethe various sheets, a polish is given to the tion of a belt embodying our invention; 9f) surface of the paper. and

40 This process gives good results, but" is Fig. 3 is a plan view of the same, the uplaborious, slow, and expensive. In the ap- .per ply of the belt being shown as broken plication above referred to, we have disclosed away at the left. a machine adapted to produce the same result by continuous operation, A web of Fig; l, the paper to be finished is fed from paper (although sheets can be used as well) a reel 10, over a guide roll 11, between is fed between coacting pressure rolls over pressure rolls 12 and 13, over a second guide which belts of linen or other-finishing materoll 14, and is finally woundup on a reel rial are led. One pressure roll is made of 15, which is preferably driven by a slipping resilient material, so that the belts will not belt not shown. The papermay, however, be damaged, and so that a slight amount of be fed in the form of sheets if desired. As

slip will occur between the belts and the is fully described in the application above paper, as is all fully set forth in the applireferred to, the upper roll 12 is preferably In the form of machine illustrated in i nmde of some hard material such as steel, while the lower roll ll, is preferably made oi some 'reletiyel ieldingr, elastic ninterizll :1; hui'd robber. eonipressoil cotton, eornpreo-zed paper, eto, capuble of withstz nding high pressure Without excessive detornnition nt the nip of the rolls. Between the paper and the upper roll passes a belt ll) of su table liuii hing nniteriul, eueh us linen, which eurrieil by rolls l'T. One ol' three l'UilrB htl positively driven (1:4 by :1 chain 18 running: over :i :aprorlzet. on the elniit oi" roll l2; and one in ninile iul'jusnible, us by :L hand error; ill, to keep the belt zit nil tunes in it proper eoiulitiou oi ten.-;ion. lietuein the paper und the lower pre or roll is; at similar belt 220. curried on rolls Ll, of which one is driven by u ehuin l'roni the shalt of roll it? end one in udjustuble by :1 lie/Till-ST'1'GW i2 3. able guides 2 1, fully described in the upplieziition referred to, ureprovided to direct the belt in e lint condition between the pressure rolls.

The construction of the bolts 16 and will now be dear-ribed; and, us, they are ex- :ieily similar, :1 description ol one will nulllee For both. The belts are preferubly ll'liltlt, oi' linen huring the pattern it lF; desiired to Mr pressupon the puper, ultliouo h other liZtlJi'lP-R may be need. It will readily be seen thut my super-position o'l: layers of the Fabric to form :1 joint would be ilnposeible, as at every revolution of the boltthe iinpreesion ot the joint would be impressed upon the paper. Tlo avoid this, the belt is nuule ol? two plies 25 and 20, us shown. One ol; these plies, us

526, has its two ends trimmed to (\Xlt'l'lfy the rightlength, and brought into uieely :iliultin r relution. Thin joining of the ends pre'i'erobly done with ply 25, as it limiting, the :l orinution of the joint and the securing of the two plies at this point. being}; enrried on sinuiltuneously. (ire-at cure nuint be tulten in this operation to have the warp threads olf the fabric severed cleanly, and the warp threudn at each end brought together witlniiut any overlap or gap. This joint 18 denoted 1n the drawings by lhe other ply then laid 011 and secured by any suitable adhesive, and its joint made in u similar fashion, but sepnrnted or stag;-- gored from the joint in the liret ply. This; second joint is denoted by 255.

The joints 2? and 28 are shown, for illustrative purposes, in the drawings by heavier liner v than the lines indieuting the weft threads of the l'iubrie. The actual lines of these joints, however, and pzlrtieuhirly the joint on the outside ply, or the one preeented to the eurlz'u'e of the paper, must be lilattle with extreme euro no that the liner; oi the joint are roinpzu'zible for all przretieul purposes with 2. line oil ono ot the lzibrle threinln. By trimming; the ends oi the ply with an extremely sharp cutter and by tail;- ing care that the abutting ends eoniplen'ient one another Without appreciable errors, 2L joint is; produced presenting; a smooth, unblemished surface to the paper to be finished, and u belt uniform througl'iout its entire Cll" euni'lerenee is ineured,

We eluini l. in ondlee hand adapted for use in niuehines l'or finishing paper, comprising ii pnir oi? plies udheiiirely eeeured together,

one oi Whieh in eoniposeil oil? lubrie lowing :i ritlern which in to be reproducedupon the paper, rind having a joint tl'iereiu which formed by the obutting of the eleunly severed Wnrp threads oi the Fabric, and the other of which has a joint Formed by the al'iutting' of two elezinly severed ends, the two joints being spared one from another, whereby the paper lii'iieheil by mid band is free from uppreeiirble blemishes repro dueed from said joints.

A. belt .l'or finishing paper presenting n textile sur'luee buying); :1 butt joint, the surface configuration ol? the belt through out it, entire eireumil'erenee including the butt joint being of such uni iorniity that no uppreeiuble blemishes; are produced in puper finished thereby.

In testimony whereof we have ullixed our signatures.

FRANK C. LADD. FRANKLIN G. NEAL,

lit) 

